The diameter of the circle b is equal to the radius of circle a. If the radius of circle b is xy, what is the area of circle a?

Ahigh definition tv cost $800 with a down payment of 2/5 of the cost. how much is left to pay, in dollars after the down payment has been made?

Aregular hexagon rotates counterclockwise about its center. it turns through angles greater than 0° and less than or equal to 360°. at how many different angles will the hexagon map onto itself?

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years